參數(shù)資料
型號(hào)： E-L9935013TR
廠商： STMICROELECTRONICS
元件分類： 運(yùn)動(dòng)控制電子
英文描述： STEPPER MOTOR CONTROLLER, 2.5 A, PDSO20
封裝： ROHS COMPLIANT, POWER, MO-166, SOP-20
文件頁(yè)數(shù)： 5/29頁(yè)
文件大小： 311K
代理商： E-L9935013TR
L9935
Functional description
5.2
Full bridge function
Figure 5.
Displays a full bridge including the current sense circuit.
5.2.1
No current
Bit 5, bit 4 (corresponding bit 2 and bit1 for bridge B) both are HIGH, the current logic will
inhibit all drivers D11, D12, D21, D22 turning off M11, M12, M21, M22 independently from the
signal of the current sense comparator comp 1.
5.2.2
Turning on
Changing bit 5 or bit 4 or both to LOW will turn on either M11 and M22 or M21 and M12
(depending on the phase signal bit 3). Current will start to flow through the load. The current
will be sensed by the drop across R1.
The threshold of the comparator comp 1 depends on the current settings of bit 5 and bit 4.
The current will rise until it exceeds the turn off threshold of comp 1.
5.2.3
Chopping
Exceeding the threshold of comp 1 the drive logic will turn off the sink transistor (M12 or
M22). The sink transistor periodically is turned on again by the oscillator. Immediately after
turning on M12 or M22 the comparator comp 1 will be inhibited for a certain time to blank
switch over spikes caused by capacitive load components up to 5 nF.
Turning off for example M12 will yield a flyback current through D11. (So now the free
wheeling current flows through M21, the load and D11).
This leads to a slow current decay during flyback. Maximum duty cycles of more than 85%
(at fOSC = 25kHz) are possible. In this case current flows of both bridges will overlap (not
shown in Figure 7).
DRIVE
LOGIC
CURRENT
LOGIC
bit3, (bit0)
bit5, (bit2)
bit4, (bit1)
CURRENT ADJUST
INHIBIT
ON HH
LOAD
+
-
τ
D11
M11
D12
M12
D11
A1
A2
VS
R1
R1 EXTERNAL
SENSE RESISTOR
D12
COMP1
D22
D21
D22
M22
D21
M21
D99AT419
相關(guān)PDF資料
PDF描述
E1L33-3BOA6-02 T-1 SINGLE COLOR LED, BLUE, 3 mm
E1L35-3G0A7-02 T-1 SINGLE COLOR LED, GREEN, 3 mm
E1L35-3G0A5-02 T-1 SINGLE COLOR LED, GREEN, 3 mm
E1SAD20-32.6864MTR QUARTZ CRYSTAL RESONATOR, 32.6864 MHz
E1SBA18-11.0592MTR QUARTZ CRYSTAL RESONATOR, 11.0592 MHz
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
E-L9997ND 制造商:STMicroelectronics 功能描述:MOSFET DRVR 2.2A 2-OUT HALF BRDG NON-INV 20SOIC - Rail/Tube
E-L9997ND013TR 制造商:STMicroelectronics 功能描述:MOSFET DRVR 2.2A 2-OUT HALF BRDG NON-INV 20SOIC - Tape and Reel
ELA110-14-10 制造商:Misc 功能描述:
ELA110-14-25 制造商:Misc 功能描述:
ELA114-08-10 制造商:Misc 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*